Cord winding device for large-size sunshade

ABSTRACT

Cord winding device for large-size sunshade, including a seat body, a tube body and a cord winder. The seat body is tightly fitted around the tube body. The cord winder is passed through two sides of the seat body and tube body. The cord winder is composed of a locating seat and a crank movably connected with the locating seat. The locating seat is connected with the seat body. An outer circumference of the locating seat is formed with multiple oblique recesses which are serially connected to form an annular face. A locating block outward projects from upper side of the crank. A front end of a bent insertion pin is passed through a through hole of the locating block and fitted with a resilient member. A locking member is disposed on the crank for cooperatively for winding a cord.

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a cord winding device for large-size sunshade, and more particularly to a cord winding device in which a cord winder is passed through two sides of a seat body and can be easily operated for stretching or collapsing a large-size sunshade or the like. The cord winding device also is able to firmly locate the sunshade after stretched.

[0002] A conventional cord winding device for large-size sunshade including a main tube, a push rod, a rotary cylinder driving mechanism, a cord body and a C-shaped fixing hoop. The main transmission elements are received in the main tube. A hive-like collar is fitted with upper side of the main tube for connecting with ribs. The central stem is passed through the collar to extend into the main tube. A certain portion of the main tube is formed with a through hole at which the rotary cylinder driving mechanism is pivotally disposed. The push rod via a fixing plate is inlaid in the central stem. The bottom end of the push rod via a pin member is pivotally connected with an elongated link. The rotary cylinder driving mechanism has a rotary cylinder transversely disposed in the main tube. A long rotary shaft is inserted in the rotary cylinder. Two ends of the rotary shaft are passed through the main tube. One of the two ends is fitted with a rocking lever. An annular flange is formed on middle portion of the rotary shaft. One end of the cord body is connected with the bottom end of the push rod, while the other end thereof is connected with the bottom end of the link. The cord body can pass through the annular flange of the rotary cylinder to form winding sections in different winding directions. The inner circumference of the C-shaped fixing hoop is formed with locating toothed face. When rotating the rocking lever, the link and the cord body push and drive the central stem to move up and down within the main tube so as to stretch or collapse the sunshade. However, the locating toothed face of the fixing hoop makes it uneasy and inconvenient to operate the winding device in both directions. In addition, the locating effect is poor. Moreover, the cord body is passed through the annular flange of the rotary cylinder so that after a long period of use, the cord body tends to be worn out.

SUMMARY OF THE INVENTION

[0003] It is therefore a primary object of the present invention to provide a cord winding device for large-size sunshade in which the insertion pin of the crank is leant on the oblique recess of the locating seat of the cord winder so that the cord can be continuously one-way wound for stretching the sunshade. Also, the crank is prevented from being cranked backward and can be firmly located.

[0004] It is a further object of the present invention to provide the above cord winding device in which when the insertion pin is leant against the stop face of the locating block, the crank can be cranked in both directions for stretching and collapsing the sunshade. Therefore, the operation is facilitated.

[0005] According to the above objects, the cord winding device for large-size sunshade of the present invention includes a seat body, a tube body and a cord winder. The seat body is tightly fitted around the tube body. The cord winder is passed through two sides of the seat body and tube body. The cord winder is composed of a locating seat and a crank movably connected with the locating seat. The locating seat is formed with a central through hole. An outer circumference of the locating seat is formed with multiple oblique recesses which are serially connected into an annular face. The locating seat is connected with the seat body. A handle is disposed on one side of lower end of the crank. An upper end of the crank has a profile corresponding to the locating seat. A locating block outward projects from upper side of the crank. A lower side of the locating block is formed with a tapered slope arch face. A rear end of the slope arch face is immediately adjacent to a stop face. The locating block is formed with a socket corresponding to the oblique recess of the locating seat. One side of socket is formed with a through hole. A front end of a bent insertion pin is passed through the through hole and the socket and fitted with a resilient member. The crank cooperates with a locking member for winding the cord.

[0006] The present invention can be best understood through the following description and accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

[0007]FIG. 1 is a perspective assembled view of the present invention;

[0008]FIG. 2 is a perspective exploded view of the present invention;

[0009]FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, showing the relationship between the seat body, tube body and cord winder of the present invention;

[0010]FIG. 4 is a sectional view taken along line 4-4 of FIG. 1, showing the relationship between the locating seat, insertion pin and crank of the present invention;

[0011]FIGS. 5a, 5 b and 5 c are plane view, sectional view taken along line 5-5 of FIG. 1 and perspective view, showing that the insertion pin is movably leant against the locating seat of the present invention;

[0012]FIGS. 6a, 6 b and 6 c are plane view, sectional view and perspective view, showing that the insertion pin is detached from the locating seat of the present invention; and

[0013]FIG. 7 shows the operation of the cord winding device of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Please refer to FIGS. 1, 2 and 3. The cord winding device for large-size sunshade of the present invention includes a seat body 1, a tube body 2 and a cord winder 3.

[0015] The seat body 1 is formed with a vertical hollow section in which the tube body 2 is tightly fitted. Two cavities 11, 13 are respectively formed on two sides of the seat body 1. A through hole 12 with smaller diameter inward extends from the cavity 11, while another through hole 14 with smaller diameter inward extends from the cavity 13. The through holes 12, 14 are aligned with two through holes 21, 22 of the tube body 2.

[0016] The cord winder 3 is composed of a locating seat 31, a crank 32, an insertion pin 33, a cap member 38 and a pin shaft 37.

[0017] The locating seat 31 is formed with a central through hole 312. Multiple thread holes 311 are formed around the through hole 312. The outer circumference of the locating seat 31 is formed with multiple oblique recesses 313 which are serially connected into an annular face. A flange 314 is formed on the outer circumference of the locating seat 31. The locating seat 31 is inlaid in the cavity 11 of the seat body 1. Screws 34 are screwed into the thread holes 311 to lock the locating seat 31 on the seat body 1.

[0018] A handle 321 is disposed on one side of lower end of the crank 32. The upper end of the crank 32 has a profile corresponding to the locating seat 31. A locating block 322 outward projects from upper side of the crank 32. The lower side of the locating block 322 is formed with a tapered slope arch face 323. A rear end of the slope arch face 323 is immediately adjacent to a stop face 324. The locating block 322 is formed with a socket 326 corresponding to the oblique recess 313 of the locating seat 31. One side of socket 326 is formed with a through hole 327. A front end of the bent insertion pin 33 is passed through the through hole 327 and the socket 326 and fitted into a spring 36. The front end of the insertion pin 33 is formed with a notch 331 for connecting with a fastening ring. The upper end of the crank 32 is formed with a central rectangular perforation 325 for the pin shaft 37 to pass therethrough.

[0019] The pin shaft 37 is sequentially passed through the crank 32, the locating seat 31, the seat body 1 and the tube body 2 and inserted into the cap member 38 having a flange 382. The front end of the pin shaft 37 is formed with a thread section 373 on which two nuts are screwed. A rectangular engaging block 372 is formed under a pin head formed at the other end the pin shaft 37. The engaging block 372 is engaged in the rectangular perforation 325 of the crank 32. The center of the pin shaft 37 is formed with a through hole 371 for a cord to pass therethrough.

[0020] Please refer to FIGS. 2 and 3. The cord winder 3 is fitted in the seat body 1 and the tube body 2 for easily stretching or collapsing a large-size sunshade. The engaging block 372 of the pin shaft 37 is engaged in the perforation 325 of the crank 32 so that by means of cranking the crank 32, the pin shaft 37 is rotated along with the crank 32. At this time, the bent insertion pin 33 fitted in the locating block 322 of the crank 32 will be wavily transversely moved along the oblique recesses 313 of the locating seat 31. The fastening ring 35 connected with the insertion pin 33 will compress the spring 36 when gradually moving to the higher portion of the oblique recess 313. When moving to the adjacent oblique recess 313, the restoring force of the spring 36 again pushes the front end of the insertion pin 33 to lean on the oblique recess 313. Therefore, the cord can be continuously one-way wound for stretching the sunshade. When cranked in reverse direction, the front end of the insertion pin 33 will abut against the stop face 315 of the oblique recess 313 so that the crank 32 is prevented from being cranked backward and is well located.

[0021] Please refer to FIGS. 2, 4, 5 a to 5 c and 6 a to 6 c. When turning the bent insertion pin 33, the insertion pin 33 will gradually slide out along the tapered slope arch face 323 formed on lower side of the locating block 322 of the crank 32. At this time, the fastening ring 35 connected with the insertion pin 33 will compress the spring 36 and finally lean against the stop face 324 of the locating block 322. At this time, the bent insertion pin 33 will be detached from the locating seat 31. Under such circumstance, when rotated, the insertion pin 33 will not contact with the respective oblique recesses 313 of the locating seat 31 so that the crank 32 can be cranked in both directions for stretching and collapsing the sunshade.

[0022] Referring to FIG. 7, in use, after the seat body 1, tube body 2 and the cord winder 3 are assembled, the crank 32 can be cranked to easily stretch the large-size sunshade for shading sunlight. The sunshade can be easily operated and reliably located.

[0023] In FIG. 2, the central perforation of the crank and the engaging block of the pin shaft are both rectangular. However, the perforation of the crank and the engaging block of the pin shaft can be alternatively formed with identical polygonal shape to achieve the same driving effect.

[0024] According to the above arrangement, the present invention has the following advantages:

[0025] 1. The insertion pin of the crank is leant on the oblique recess of the locating seat so that the cord can be continuously one-way wound for stretching the sunshade. The crank is prevented from being cranked backward and can be firmly located.

[0026] 2. When the insertion pin is leant against the stop face of the locating block, the crank can be cranked in both directions for stretching and collapsing the sunshade.

[0027] The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention. 

What is claimed is:
 1. Cord winding device for large-size sunshade, comprising a seat body, a tube body and a cord winder, the seat body being tightly fitted around the tube body, the cord winder being passed through two sides of the seat body and tube body, said cord winding device being characterized in that: the seat body is formed with a vertical hollow section in which the tube body is tightly fitted, two sides of the seat body and tube body being respectively formed with through holes through which the cord winder is passed; and the cord winder is composed of a locating seat and a crank movably connected with the locating seat, the locating seat being formed with a central through hole, an outer circumference of the locating seat being formed with multiple oblique recesses which are serially connected into an annular face, the locating seat being connected with the seat body, a handle being disposed on one side of lower end of the crank, an upper end of the crank having a profile corresponding to the locating seat, a locating block outward projecting from upper side of the crank, a lower side of the locating block being formed with a tapered slope arch face, a rear end of the slope arch face being immediately adjacent to a stop face, the locating block being formed with a socket corresponding to the oblique recess of the locating seat, one side of socket being formed with a through hole, a front end of a bent insertion pin being passed through the through hole and the socket and fitted with a resilient member, the crank cooperating with a locking member for winding the cord.
 2. Cord winding device for large-size sunshade as claimed in claim 1, wherein two cavities are respectively formed on two sides of the seat body, a through hole with smaller diameter inward extending from each of the cavities in which the cord winder is mounted.
 3. Cord winding device for large-size sunshade as claimed in claim 1, wherein a flange is formed on the outer circumference of the locating seat and the locating seat is inlaid in the cavity of one side of the seat body, the locating seat being formed with multiple thread holes, screws being screwed into the thread holes to lock the locating seat on the seat body.
 4. Cord winding device for large-size sunshade as claimed in claim 1, wherein the resilient member fitted with the front end of the bent insertion pin is a spring, the front end of the insertion pin being formed with a notch for connecting with a fastening ring, whereby the insertion pin is retractable and extensible.
 5. Cord winding device for large-size sunshade as claimed in claim 1, wherein the upper end of the crank is formed with a rectangular perforation and a rear end of the locking member is formed with a rectangular engaging block fitted in the rectangular perforation for winding the cord.
 6. Cord winding device for large-size sunshade as claimed in claim 1 or 5, wherein the locking member is a pin shaft which is sequentially passed through the crank, the locating seat, the seat body and the tube body and inserted into a cap member having a flange and inlaid in the cavity of the other side of the seat body, a front end of the pin shaft being formed with a thread section on which nuts are screwed, a center of the pin shaft being formed with a through hole for the cord to pass therethrough.
 7. Cord winding device for large-size sunshade as claimed in claim 5, wherein the perforation of the crank is polygonal and the engaging block of the locking member is also polygonal corresponding to the perforation of the crank for winding the cord. 